We've just had the builders in to block up an external back door as we only ever use the doors to the conservatory to go out. They haven't done it in breeze block though just plasterboarded over it on the inside (with the pvc glass door on outside still in place) and the bricklayer is coming tomorrow to actually remove the back door and match the brickwork on the outside. I'm starting to freak out now that he has done a botch job
Is this normal? Or should he have used a breeze block on the inside to match the existing inside walls?
No problem from a structure point of view but like catsgo says it is important to have a similar level of insulation in the new bit of wall. If you don't, then that one patch of wall will be colder than the rest of the walls and will attract condensation, and you'll have some big patches of black mold growing there within 2 years.